    /**
     * @author Ed Spencer
     * @class Ext.data.association.HasMany
     *
     * <p>Represents a one-to-many relationship between two models. Usually created indirectly via a model definition:</p>
     *
    <pre><code>
    Ext.define('Product', {
        extend: 'Ext.data.Model',
        fields: [
            {name: 'id',      type: 'int'},
            {name: 'user_id', type: 'int'},
            {name: 'name',    type: 'string'}
        ]
    });

    Ext.define('User', {
        extend: 'Ext.data.Model',
        fields: [
            {name: 'id',   type: 'int'},
            {name: 'name', type: 'string'}
        ],
        // we can use the hasMany shortcut on the model to create a hasMany association
        hasMany: {model: 'Product', name: 'products'}
    });
    </pre></code>
    *
     * <p>Above we created Product and User models, and linked them by saying that a User hasMany Products. This gives
     * us a new function on every User instance, in this case the function is called 'products' because that is the name
     * we specified in the association configuration above.</p>
     *
     * <p>This new function returns a specialized {@link Ext.data.Store Store} which is automatically filtered to load
     * only Products for the given model instance:</p>
     *
    <pre><code>
    //first, we load up a User with id of 1
    var user = Ext.create('User', {id: 1, name: 'Ed'});

    //the user.products function was created automatically by the association and returns a {@link Ext.data.Store Store}
    //the created store is automatically scoped to the set of Products for the User with id of 1
    var products = user.products();

    //we still have all of the usual Store functions, for example it's easy to add a Product for this User
    products.add({
        name: 'Another Product'
    });

    //saves the changes to the store - this automatically sets the new Product's user_id to 1 before saving
    products.sync();
    </code></pre>
     *
     * <p>The new Store is only instantiated the first time you call products() to conserve memory and processing time,
     * though calling products() a second time returns the same store instance.</p>
     *
     * <p><u>Custom filtering</u></p>
     *
     * <p>The Store is automatically furnished with a filter - by default this filter tells the store to only return
     * records where the associated model's foreign key matches the owner model's primary key. For example, if a User
     * with ID = 100 hasMany Products, the filter loads only Products with user_id == 100.</p>
     *
     * <p>Sometimes we want to filter by another field - for example in the case of a Twitter search application we may
     * have models for Search and Tweet:</p>
     *
    <pre><code>
    Ext.define('Search', {
        extend: 'Ext.data.Model',
        fields: [
            'id', 'query'
        ],

        hasMany: {
            model: 'Tweet',
            name : 'tweets',
            filterProperty: 'query'
        }
    });

    Ext.define('Tweet', {
        extend: 'Ext.data.Model',
        fields: [
            'id', 'text', 'from_user'
        ]
    });

    //returns a Store filtered by the filterProperty
    var store = new Search({query: 'Sencha Touch'}).tweets();
    </code></pre>
     *
     * <p>The tweets association above is filtered by the query property by setting the {@link #filterProperty}, and is
     * equivalent to this:</p>
     *
    <pre><code>
    var store = Ext.create('Ext.data.Store', {
        model: 'Tweet',
        filters: [
            {
                property: 'query',
                value   : 'Sencha Touch'
            }
        ]
    });
    </code></pre>
     */
    Ext.define('Ext.data.association.HasMany', {
        extend: 'Ext.data.association.Association',
        alternateClassName: 'Ext.data.HasManyAssociation',
        requires: ['Ext.util.Inflector'],

        alias: 'association.hasmany',

        /**
         * @cfg {String} foreignKey The name of the foreign key on the associated model that links it to the owner
         * model. Defaults to the lowercased name of the owner model plus "_id", e.g. an association with a where a
         * model called Group hasMany Users would create 'group_id' as the foreign key. When the remote store is loaded,
         * the store is automatically filtered so that only records with a matching foreign key are included in the
         * resulting child store. This can be overridden by specifying the {@link #filterProperty}.
         * <pre><code>
    Ext.define('Group', {
        extend: 'Ext.data.Model',
        fields: ['id', 'name'],
        hasMany: 'User'
    });

    Ext.define('User', {
        extend: 'Ext.data.Model',
        fields: ['id', 'name', 'group_id'], // refers to the id of the group that this user belongs to
        belongsTo: 'Group'
    });
         * </code></pre>
         */

        /**
         * @cfg {String} name The name of the function to create on the owner model to retrieve the child store.
         * If not specified, the pluralized name of the child model is used.
         * <pre><code>
    // This will create a users() method on any Group model instance
    Ext.define('Group', {
        extend: 'Ext.data.Model',
        fields: ['id', 'name'],
        hasMany: 'User'
    });
    var group = new Group();
    console.log(group.users());

    // The method to retrieve the users will now be getUserList
    Ext.define('Group', {
        extend: 'Ext.data.Model',
        fields: ['id', 'name'],
        hasMany: {model: 'User', name: 'getUserList'}
    });
    var group = new Group();
    console.log(group.getUserList());
         * </code></pre>
         */

        /**
         * @cfg {Object} storeConfig Optional configuration object that will be passed to the generated Store. Defaults to
         * undefined.
         */

        /**
         * @cfg {String} filterProperty Optionally overrides the default filter that is set up on the associated Store. If
         * this is not set, a filter is automatically created which filters the association based on the configured
         * {@link #foreignKey}. See intro docs for more details. Defaults to undefined
         */

        /**
         * @cfg {Boolean} autoLoad True to automatically load the related store from a remote source when instantiated.
         * Defaults to <tt>false</tt>.
         */

        /**
         * @cfg {String} type The type configuration can be used when creating associations using a configuration object.
         * Use 'hasMany' to create a HasMany association
         * <pre><code>
    associations: [{
        type: 'hasMany',
        model: 'User'
    }]
         * </code></pre>
         */

        constructor: function(config) {
            var me = this,
                ownerProto,
                name;

            me.callParent(arguments);

            me.name = me.name || Ext.util.Inflector.pluralize(me.associatedName.toLowerCase());

            ownerProto = me.ownerModel.prototype;
            name = me.name;

            Ext.applyIf(me, {
                storeName : name + "Store",
                foreignKey: me.ownerName.toLowerCase() + "_id"
            });

            ownerProto[name] = me.createStore();
        },

        /**
         * @private
         * Creates a function that returns an Ext.data.Store which is configured to load a set of data filtered
         * by the owner model's primary key - e.g. in a hasMany association where Group hasMany Users, this function
         * returns a Store configured to return the filtered set of a single Group's Users.
         * @return {Function} The store-generating function
         */
        createStore: function() {
            var that            = this,
                associatedModel = that.associatedModel,
                storeName       = that.storeName,
                foreignKey      = that.foreignKey,
                primaryKey      = that.primaryKey,
                filterProperty  = that.filterProperty,
                autoLoad        = that.autoLoad,
                storeConfig     = that.storeConfig || {};

            return function() {
                var me = this,
                    config, filter,
                    modelDefaults = {};

                if (me[storeName] === undefined) {
                    if (filterProperty) {
                        filter = {
                            property  : filterProperty,
                            value     : me.get(filterProperty),
                            exactMatch: true
                        };
                    } else {
                        filter = {
                            property  : foreignKey,
                            value     : me.get(primaryKey),
                            exactMatch: true
                        };
                    }

                    modelDefaults[foreignKey] = me.get(primaryKey);

                    config = Ext.apply({}, storeConfig, {
                        model        : associatedModel,
                        filters      : [filter],
                        remoteFilter : false,
                        modelDefaults: modelDefaults
                    });

                    me[storeName] = new Ext.data.Store(config);
                    if (autoLoad) {
                        me[storeName].load();
                    }
                }

                return me[storeName];
            };
        },

        /**
         * Read associated data
         * @private
         * @param {Ext.data.Model} record The record we're writing to
         * @param {Ext.data.reader.Reader} reader The reader for the associated model
         * @param {Object} associationData The raw associated data
         */
        read: function(record, reader, associationData){
            var store = record[this.name](),
                inverse,
                items, iLen, i;

            store.add(reader.read(associationData).records);

            //now that we've added the related records to the hasMany association, set the inverse belongsTo
            //association on each of them if it exists
            inverse = this.associatedModel.prototype.associations.findBy(function(assoc){
                return assoc.type === 'belongsTo' && assoc.associatedName === record.$className;
            });

            //if the inverse association was found, set it now on each record we've just created
            if (inverse) {
                items = store.data.items;
                iLen  = items.length;

                for (i = 0; i < iLen; i++) {
                    items[i][inverse.instanceName] = record;
                }
            }
        }
    });